TY  - BOOK
AU  - Cheney,E.W., x
AU  - x
TI  - Introduction oto approximartion theory: x
SN  - x
U1  - 510/CHI 
PY  - 1966///
CY  - N.Y.
PB  - McGraw -Hil
KW  - Mathematics
N1  - x
ER  -